scholarly journals Bottom-up engineering of thermoelectric nanomaterials and devices from solution-processed nanoparticle building blocks

2017 ◽  
Vol 46 (12) ◽  
pp. 3510-3528 ◽  
Author(s):  
Silvia Ortega ◽  
Maria Ibáñez ◽  
Yu Liu ◽  
Yu Zhang ◽  
Maksym V. Kovalenko ◽  
...  
Keyword(s):  
Solid State ◽  
Building Blocks ◽  
Engineered Nanomaterials ◽  
Solution Processed ◽  
Bottom Up ◽  
Direct Solid

Nanoparticle-based bottom-up engineered nanomaterials are extremely appealing for the direct solid-state conversion between heat and electricity.

A Bottom-Up Approach to Solution-Processed, Atomically Precise Graphitic Cylinders on Surfaces

2018 ◽  
Author(s):  
Erik Leonhardt ◽  
Jeff M. Van Raden ◽  
David Miller ◽  
Lev N. Zakharov ◽  
Benjamin Aleman ◽  
...  
Keyword(s):  
Self Assembly ◽  
Carbon Nanostructures ◽  
Carbon Nanomaterials ◽  
Circle Packing ◽  
Pyrolytic Graphite ◽  
Building Blocks ◽  
Bottom Up ◽  
Casting Technique ◽  
New Class ◽  
Solution Casting Technique

Extended carbon nanostructures, such as carbon nanotubes (CNTs), exhibit remarkable properties but are difficult to synthesize uniformly. Herein, we present a new class of carbon nanomaterials constructed via the bottom-up self-assembly of cylindrical, atomically-precise small molecules. Guided by supramolecular design principles and circle packing theory, we have designed and synthesized a fluorinated nanohoop that, in the solid-state, self-assembles into nanotube-like arrays with channel diameters of precisely 1.63 nm. A mild solution-casting technique is then used to construct vertical “forests” of these arrays on a highly-ordered pyrolytic graphite (HOPG) surface through epitaxial growth. Furthermore, we show that a basic property of nanohoops, fluorescence, is readily transferred to the bulk phase, implying that the properties of these materials can be directly altered via precise functionalization of their nanohoop building blocks. The strategy presented is expected to have broader applications in the development of new graphitic nanomaterials with π-rich cavities reminiscent of CNTs.

Thermoelectric Properties of PbSe Nanocomposites from Solution-Processed Building Blocks

2021 ◽  
Vol 4 (2) ◽  
pp. 2014-2019
Author(s):  
Ning-Ning Zhou ◽  
Ze-Qing Hu ◽  
Ramzi Nasser ◽  
Ji-Ming Song
Keyword(s):  
Thermoelectric Properties ◽  
Building Blocks ◽  
Solution Processed

scholarly journals Attrition as a bottom-up pathway to subnational democratization

2021 ◽  
pp. 019251212110192
Author(s):  
Trix van Mierlo
Keyword(s):  
Civil Society ◽  
Field Research ◽  
Building Blocks ◽  
The Philippines ◽  
Causal Process ◽  
Bottom Up ◽  
System A ◽  
Extensive Field ◽  
Democratic System

Oftentimes, democracy is not spread out evenly over the territory of a country. Instead, pockets of authoritarianism can persist within a democratic system. A growing body of literature questions how such subnational authoritarian enclaves can be democratized. Despite fascinating insights, all existing pathways rely on the actions of elites and are therefore top-down. This article seeks to kick-start the discussion on a bottom-up pathway to subnational democratization, by proposing the attrition mechanism. This mechanism consists of four parts and is the product of abductive inference through theory-building causal process tracing. The building blocks consist of subnational democratization literature, social movement theory, and original empirical data gathered during extensive field research. This case study focuses on the ‘Dynasty Slayer’ in the province of Isabela, the Philippines, where civil society actors used the attrition mechanism to facilitate subnational democratization. This study implies that civil society actors in subnational authoritarian enclaves have agency.

scholarly journals Fluorinated azobenzenes as supramolecular halogen-bonding building blocks

2019 ◽  
Vol 15 ◽  
pp. 2013-2019 ◽  
Author(s):  
Esther Nieland ◽  
Oliver Weingart ◽  
Bernd M Schmidt
Keyword(s):  
Solid State ◽  
Dft Calculations ◽  
Visible Light ◽  
Half Life ◽  
Photophysical Properties ◽  
Bathochromic Shift ◽  
Halogen Bonding ◽  
Building Blocks ◽  
Partial Overlap

ortho-Fluoroazobenzenes are a remarkable example of bistable photoswitches, addressable by visible light. Symmetrical, highly fluorinated azobenzenes bearing an iodine substituent in para-position were shown to be suitable supramolecular building blocks both in solution and in the solid state in combination with neutral halogen bonding acceptors, such as lutidines. Therefore, we investigate the photochemistry of a series of azobenzene photoswitches. Upon introduction of iodoethynyl groups, the halogen bonding donor properties are significantly strengthened in solution. However, the bathochromic shift of the π→π* band leads to a partial overlap with the n→π* band, making it slightly more difficult to address. The introduction of iodine substituents is furthermore accompanied with a diminishing thermal half-life. A series of three azobenzenes with different halogen bonding donor properties are discussed in relation to their changing photophysical properties, rationalized by DFT calculations.

Graphene Films: Solution-Processed Ultrathin Chemically Derived Graphene Films as Soft Top Contacts for Solid-State Molecular Electronic Junctions (Adv. Mater. 10/2012)

2012 ◽  
Vol 24 (10) ◽  
pp. 1281-1281
Author(s):  
Tao Li ◽  
Jonas Rahlf Hauptmann ◽  
Zhongming Wei ◽  
Søren Petersen ◽  
Nicolas Bovet ◽  
...  
Keyword(s):  
Solid State ◽  
Molecular Electronic ◽  
Solution Processed ◽  
Graphene Films ◽  
Molecular Electronic Junctions ◽  
Electronic Junctions

Clostridium isatidis colonised carbon electrodes: voltammetric evidence for direct solid state redox processes

2000 ◽  
Vol 24 (3) ◽  
pp. 179-181 ◽  
Author(s):  
Richard G. Compton ◽  
Susan J. Perkin ◽  
David P. Gamblin ◽  
James Davis ◽  
Frank Marken ◽  
...  
Keyword(s):  
Solid State ◽  
Carbon Electrodes ◽  
Redox Processes ◽  
Direct Solid

Bottom Up Chalcogenide Thermoelectric Materials from Solution-Processed Nanostructures

2017 ◽  
Vol 4 (20) ◽  
pp. 1700517 ◽  
Author(s):  
Defang Ding ◽  
Chenguang Lu ◽  
Zhiyong Tang
Keyword(s):  
Thermoelectric Materials ◽  
Solution Processed ◽  
Bottom Up

Synthesis of scheelite with wolframite and calcium carbonate by a direct solid-state synthesis route

2015 ◽  
Vol 48 ◽  
pp. 301-304 ◽  
Author(s):  
Linsheng Wan ◽  
Liang Yang ◽  
Yongming Chen ◽  
Lifu Zhao ◽  
Hongchao Li
Keyword(s):  
Calcium Carbonate ◽  
Solid State ◽  
Solid State Synthesis ◽  
Synthesis Route ◽  
Direct Solid
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